Interesting comparison. If exposures were the same at 4000 to 6400, it suggests they are calculating ISO quite differently. But now I'm curious... if you downsized the A7 image so it was the same size as the Fuji..
To my eye, it is indeed very close. I dare say the Fuji looks a little better than the Sony in some areas, but I suspect if you downsized the Sony to make them equivalent, the A7 would look much better. But I could be completely wrong too.